[DossarLX ODI]

"Additionally, as a white flag is the universal symbol for surrender to superior force, the black flag is a symbol of defiance, an opposition to surrender."

I'm assuming white flag and blackflag are interchangeable in FFR since there's no marvellous. The "opposition" part may be that you find 1 good to be a lot worse than anything else - even maybe a missflag or booflag. As for the "white flag" being a surrender, you'd probably just give up playing the file (aka surrendering) since the good was probably random and you don't feel like playing it again. An averageflag may not be as bad because it looks a lot more interesting. Then again, you could go back to the "blacking out from shock" explanation lmfao.

I can definitely see a whiteflag being called a whiteflag in stepmania though - 1 perfect away from a quad. You'd probably just say "fuck I give up" if you're sick of trying to quad a song lol.